1. No need to touch the smartphone/tablet. With this wireless media button, you can control music, take pictures and wake up the smart assistant with one key. 2. There is a base, which is convenient to fix on the steering wheel. 3. Use the attached base to connect the media button to the handlebar of the bicycle, keeping your sight on the road, and place your hand on the handlebar. 4. If you don't touch the button for about 30s, it will automatically enter sleep mode. 5. Easy to use, small and compact, with a wireless range of up to 10 meters. This is a media control button that allows you to play or pause music, up and down , increase or decrease multimedia volume. Size: Diameter: 36mm, Thickness: 8mm Battery model: CR2025 Compatibility:for iOS7.0 or for Android4.4+ Wireless range: 10 meters Sleep mode: 30s Colour:black Material:ABS+Silicone Package Contents: 1 x Mobile phone remote control 1 x deck base 1 x Tape Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.